Which of the following graphs best shows the velocity v of the clay ball from when it is dropped until it hits the ground?
Answers
Answer:
The correct option is;
C
Explanation:
The given information is that a clay ball is dropped from a certain height.
Therefore, the clay ball has an initial potential energy and zero kinetic energy
Which gives that the initial velocity of the clay ball = 0
As the potential energy is converted into kinetic energy, the velocity of the clay ball increases
However, if the direction of measurement of the velocity is opposite to the direction in which the clay ball is falling, the velocity of the ball progressively increases negatively as shown in option C
Final answer:
A graph of the clay ball velocity from the moment it's dropped until it hits the ground would be a straight line with a negative slope. This is because the velocity increases in the negative direction as the ball accelerates downwards under the force of gravity.
Explanation:
The graph showing the velocity v of a clay ball from when it's dropped until it hits the ground would look like a diagonal line descending from left to right with a negative slope. This is because the moment the clay ball is dropped, it starts accelerating downwards under the force of gravity. Therefore, its velocity increases in the negative direction, making the velocity-time graph a straight line with a negative slope. The slope represents the acceleration due to gravity.
Learn more about Velocity-Time Graph here:
#SPJ2
Related Questions
The heat capacity of an object depends in part on its _____. A. mass B. enthalpy C. shape D. potential energy
Sound is a example of what kind of wave
A car traveling at 37 m/s starts to decelerate steadily. It comes to a complete stop in 6 seconds.what is its acceleration? m/s
A charge of 8.5 × 10–6 C is in an electric field that has a strength of 3.2 × 105 N/C. What is the electric force acting on the charge?
Answers
Well, there you have a very important principle wrapped up in that question.
There's actually no such thing as a real, actual amount of potential energy.
There's only potential relative to some place. It's the work you have to do
to lift the object from that reference place to wherever it is now. It's also
the kinetic energy the object would have if it fell down to the reference place
from where it is now.
Here's the formula for potential energy: PE = (mass) x (gravity) x (height) .
So naturally, when you use that formula, you need to decide "height above what ?"
If you're reading a book while you're flying in a passenger jet, the book's PE is
(M x G x 0 meters) relative to your lap, (M x G x 1 meter) relative to the floor of the
plane, (M x G x 10,000 meters) relative to the ground, and maybe (M x G x 25,000 meters)
relative to the bottom of the ocean.
Let's say that gravity is 9.8 m/s² .
Then a 4kg block sitting on the floor has (39.2 x 0 meters) PE relative to the floor
it's sitting on, also (39.2 x 3 meters) relative to the floor that's one floor downstairs,
also (39.2 x 30 meters) relative to 10 floors downstairs, and if it's on the top floor of
the Amoco/Aon Center in Chicago, maybe (39.2 x 345 meters) relative to the floor
in the coffee shop that's off the lobby on the ground floor.
P.E.= mass×gravity×height, therefore 4kg×10×0= 0 J
K.E. is also equal to 0 because the block is not moving, is in the state of Inertia
speed look like?
Answers
Answer: Diagonal going up
Explanation:
End of exam
B. 0°C
C. 10°C
D. 110°C
Answers
Answers
Small fragments of meteors, formed by ice and rock mixed consitute the comets.
The answer is B) comets.
Answers
The force needed to do the work is equal to 25 N. The power of the machine doing the work is equal to 250 W.
What is power?
The power can be explained as the speed of doing work or work done in unit time. The SI unit of measurement of power joules per second (J/s) Watt (W).
Power can be defined as a time-based parameter and the change at work is done upon an object. The mathematical formula for power can be represented as mentioned below.
Power = Work/ time
P = W/t
Given, the work done by the machine, W = 2500 J
The distance moved by the object, d - 100 m
The work done can be represented in the form of the equation:
W = F.d
2500 = F.100
F = 25 N
The power of the machine doing the work, P = W/t
P = 2500 / 10
P = 250 W
Therefore, the force required to do the work is equal to 25 N. The power of the small machine doing the work is equal to 250 W.
Learn more about power, here:
#SPJ2
2500 joules in 10 seconds is a power of 250 Watts.
B. Hold and feed the infant while you supervise the activity of the older children.
C. Have the older two children continue the project on their own while you feed the infant in a separate room.
D. Prop the infant's bottle in the crib so he or she can eat while you continue to help the older children
Answers
Answer: B. Hold and feed the infant while you supervise the activity of the older children.
Explanation: On one side, a two-month-old is too young to understand that he has to wait until you finish with your other activities so you are free to feed him. His needs are urgent. Of course he is also too young to take the bottle on his own. These are the reason why options A and D are incorrect. On the other side, the other two children also need your supervision. You have to take care of them and leave them alone is not a good option. This is why option C is incorrect. Taking all these things into account I find option B as the best answer.